Thermal power plants are the main source of emissions of air pollutants such as smoke, sulfur dioxide and nitrogen oxides. Normally it is white smoke. The thermal power plant uses the combustion of coal to heat the boiler water, transforming the boiler water into water vapor. The water vapor drives the turbine generator to produce electricity and heat. The burned coal will successively pass through a series of equipment such as denitrification equipment, dry dust collector, wet desulfurization and wet dust collector. The original black smoke has been filtered layer by layer, and water vapor is emitted from the chimney.
Due to their operating principle, thermal power plants produce significant emissions such as “noise, wastewater, waste gases and waste residues”. These emissions include dust particles, cendres and combustion gases emitted by the fuel. combustion process; various types of power plants. Waste water and waste liquids discharged during equipment operation, as well as noise emitted during power plant operation. For this reason, it may cause some environmental pollution. The white smoke from the thermal power plant chimney is actually the same as the water vapor we use in the sauna. Everyone knows that the water vapor from the sauna is non-polluting, and therefore the water vapor emitted by the chimney of the thermal power plant. the factory will not cause any harm to the environment.
First of all, you need to check the engine oil yourself, because the oil has not been changed for a long time or the oil has deteriorated, which will lead to increased friction between the bottle valve and the conduit. and the hydraulic pusher, causing the car to open whenthe accelerator pedal is open. There is an abnormal noise.
Regarding the problem of abnormal noises in cars, it is difficult for ordinary car owners to distinguish which are faulty noises and which are reasonable noises. If you go to a repair shop to check for an abnormal noise, only about 20% of cars actually have a problem. There is obviously a difference between the noise of a model equipped with a turbocharged engine and the noise of a naturally aspirated engine; models equipped with a crankcase may also produce noise due to friction, some car owners may be affected by theirs; noise after contacting different cars. Lack of understanding of mechanical knowledge, confusing reasonable abnormal noises with a vehicle breakdown. So learn to identify abnormal car noises to avoid losing ttime and energy.
The conditions for identifying car noise are limited. It is difficult to measure car noise using special instruments. The sound of a car can only be described and compared by judging the sound of everyday life. For example, the "squealing" noise caused by the dry friction of the bearing, the "clicking" noise produced by excessive valve clearance, which is similar to the "clicking" sound of a small hammer hitting the ground in cement, etc.
1. Correctly distinguish between normal and abnormal sounds.
When the car is running, the vibrations of various mechanisms will make sounds of different kinds, but the sound does not mean that the car is defective. In order to avoid unnecessary disassembly, you must first distinguish what is normal. abnormal sounds and sounds. Normal vibrations of various system components (such as noise on the motor surface), impact noise froms gears when changing gears, intake and exhaust noises using gas as a work source, gear meshing noises, etc. are all normal sounds. Abnormal noises (abnormal noises) can be divided into light noises, normal noises and malignant noises according to their impact on car performance. Slight noises, such as the flashing sound of high-voltage electrical leakage, the slight rolling noise of bearings, etc., are generally small in volume, the degree of wear of the parts is not large, and it does not There is no significant change for a long time. Such defects can still keep the car without repair.
3. When diagnosing abnormal car noises, attention should be paid to creating good auscultation conditions and trying to eliminate interference from other noises so as not to affect the accuracy of judgment.
It is best to ampproud or consciously reduce the sound, that is, use a screwdriver or other metal rod as a stethoscope to contact the sound part to amplify the sound, or use a single cylinder to cut off the fire to reduce sound, to meet diagnostic needs. The monitoring site must remain quiet to minimize human interference.